I think the new DS will drop unless they restrict its release, but don't think Canon be stupid enough to do that, (unless they have issues with it) with the new Nikon FF being on the market by then (Should), I think the MK 3 did not drop because they kept it in short supply, and for that I do believe they have had manufacturing problems, or problems they were holding back over the AF. and did not want to flood the market, to have the possibility over so many bodies being rejected or sent back, or if a recall have so many, at the time of the MK 3 release there was no other competition, so they got away with it, not so Easy with the DS release
These are my feelings of course. take the new 40D that has dropped nearly 20% in a month, has any other new Canon release done that before?
As I said My thoughts only